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5b-30=2b-3
We move all terms to the left:
5b-30-(2b-3)=0
We get rid of parentheses
5b-2b+3-30=0
We add all the numbers together, and all the variables
3b-27=0
We move all terms containing b to the left, all other terms to the right
3b=27
b=27/3
b=9
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